A patch to libpciaccess on bug http://bugs.freedesktop.org/show_bug.cgi?id=18160 upstream exists but doesn't solve the problem, just one small aspect of it. So not worth backporting it for lucid. Maybe lucid+1. The VGA arbiter work airlied is doing is needed on top of that.
Fwiw, if you're using two nvidia cards, then the -nvidia binary driver should support doing xinerama still.
A patch to libpciaccess on bug http:// bugs.freedeskto p.org/show_ bug.cgi? id=18160 upstream exists but doesn't solve the problem, just one small aspect of it. So not worth backporting it for lucid. Maybe lucid+1. The VGA arbiter work airlied is doing is needed on top of that.
Fwiw, if you're using two nvidia cards, then the -nvidia binary driver should support doing xinerama still.